The UK-based professional photographer
snapped the image over a field in northern England at 7:38 p.m.
as fog rolled through the area:

A
rare photograph of a "moonbow" photographed in northern England
during the supermoon on Oct. 16, 2016.Ben
Gwynne

Sunlight did not directly cause the rainbow, since it was well
after dark. Moonlight — which was beaming from low on
the horizon, opposite of the moonbow — refracted off droplets of
water in the fog, splitting into a rainbow of colors.

"I'd never seen one before and getting to photograph it was
amazing," Gwynne told the BBC.

"There may have been a couple of [curses]," too, Gwynne told
Business Insider via Facebook Messenger.

Gwynne set his camera to capture a long exposure, which helped
saturate the subtle lighting and colors. It also brought out the
double moonbow hovering above the main arc, plus some
orange-colored light pollution.

Sunday night's full moon was a supermoon, or when the moon swings
closest to Earth in its monthly and slightly elliptical orbit.
Technically called "perigee-syzygy
of the Earth-Moon-Sun system," supermoons are not only a bit
brighter than typical full moons, but they can also cause
stronger ocean tides and weather events.

The next supermoon is November 14, 2016 (the
closest supermoon since 1948), and after that there's one
December 13, 2016. (We wish you luck in seeing a
moonbow.)